Atypical measles pneumonia presents with variable pneumonic consolidation, hilar adenopathy, and pleural effusion, representing a presumed hypersensitivity response in incompletely immunized patients.
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Variable radiographic patterns in atypical measles warrant awareness in incompletely immunized patients; case reports leave open systematic validation.
Infection with rubeola virus after previous immunization with killed measles virus vaccine produced abnormal chest radiographs in 9 patients. Variable pneumonic consolidation occurred in all cases and was mainly lobar or segmental in distribution. Four patients had hilar adenopathy, 3 pleural effusion, and in 1 instance a pulmonary nodule remained 9 months after clearing of the acute pneumonia. Atypical measles pneumonia is a presumed hypersensitivity response in incompletely immunized patients.
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Margolin et al. (1979) studied this question.
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